TABLE 3.

Distance Growth of Weight and Height Expressed as Changes in z Scores Between Time Periods of Study

Changes in z ScoresWeightHeight
MalesFemalesPMalesFemalesP
VLBW*
 Birth to 40 wk−1.05−0.880.36−1.32−1.130.60
 40 wk to 8 mo0.200.93<0.0011.781.970.44
 8 mo to 20 mo0.530.270.060.390.320.66
 20 mo to 8 y0.660.580.630.09−.060.29
 8 y to 20 y0.130.490.0020.03−0.090.24
NBW
 8 y to 20 y0.200.250.670.01−0.080.39
  • * Age corrected for preterm birth until 8 years of age.